The German like-button does not have "Like" written on it, but "Gefällt mir".
That's considerably longer than "Like", but the iframe in the German version is still only 92px in width, just like in the English version, and therefore the counter on the right is not displayed but hidden, because it goes beyond the iframe's 92px.
Solution: Open include/dd-class.php
Go to line 936 or search for this line:
"Like Button Count" => "width:92px; height:20px;",
and replace it with:
"Like Button Count" => "width:130px; height:20px;",